Rcller cutter



Aug. 24 1926.

O. M. CARTER ROLLER CUTTER Filed Dec. 25, 1924 4 M .L R 3 m I... w L B 0n z w w J 1 titl .hpptteetion med December This invention relates to animprovement in roller cutters especially designed. for use on rotarydrills. a

The object of the invention is the prov sion. of a device of thischaracter Which is especially designed for use when i'oclc packed sendor other hard substances are encountered the drill and cutterconstituting the present invention being designed and adapted to sinkthe hole more rapidly through such formations than other cuttersheretofore proposed.

(lthei' ohjeots and advantages reside in certain novel. teetures of theconstruction, arrangement end combination of poets which will hehereinafter more fully SClibGd and phnticulsrly pointed out in theappended oleiins reference losing had to eccoinpenying; drawingsforming; a pot" this specific "on, end in Which- Figure l is s Viewpsitty in elevation v in sec -oli showing one embodies oi invent iFigure 2 is fragmentary View With pen tic? the cutter holder in sectionto it lest he the mounting of the cutters,

an 3 I ts employed the foreword end rsngement o snhstent.

is provided 3, tieties of i. met" cs orally at 5 one poet of the li-shaped recess tees designnted couch l. The 1"lii@tt5 5 operate in pertin openings 6 in the themes on hollders 8, hot n oyec" 1!. sin

said openings 6 into recess the drawings; The cntt ere notetehty mountedon s hee'tings 8 once 21 on the no 3. The snitehty m at e shown in noseries 59' I cet ied in detail View ei'emtion 5'13, lgfit. serial Ito,$757,703.

sition es by means of pins 9. The roller cutters 5. take the form ofdisks heving teeth 5 on their periphery. l Vith the arrangement shown,a, plurality of roller cutters 5 are provided along each edge of therecess so that in operation the roller cut-- tors 5 opproxii'natelydefine a ll-shaped recess. The holders or frames 3 are formed Withdepending or forwardly extending extensions 10 in Which short shafts 11are fixed h nieans'of pins 12. @n the inner ends of the shafts 11conical roller cutters 13 are rotatably mounted and on the outer ends ofthese shstts 11 disk-shaped roller cutters 14 are rotetshiy mounted. Theeoniced shaped roller eutters 13 are constrained to rots on the shafts11 by the portions 3 of the holders or tonnes 3, end the dish shapedcutters 14; me similarly constrained by means of heads 15 provided onthe sh L Ill. The hoiders or frames 3 so designed that the cutters endtheme ere spaced. at e diiieient 3P1 the e is of rotation then thecutters l3 n i e other side By vittne out this spocin cutters 13 and lt.

other side,

The

ectivenws t henced hy the sets its";

'l c the d mation forcibly to shatter and crush the same. It is byvirtue of these features that the present cutter is able to sink a holemuch more rapidly than other cutters heretofore proposed through rock,packed sand or other hard substance.

I claim 1. In a drill of the character described, a pair of inclinedframes defining a \fshaped recess between them, and roller cut tersmounted on the frames and operating along the edges of said V-shapedrecesses.

2. In a drill of the character described, a cutter having roller cuttersat its forward end provided With long and short teeth, the long teethbeing designed. to raise the drill and permit the same to fall to causethe cutter to exert a shattering action on the formation.

3. In a rotary drill, a cutter having roller cutters at its forward end,and having rneans periodically raising the drill and permemes mittingthe same to fall so that the cutters exert a shattering action on theformation.

4. In a drill, a cutter including a pair of diverging frames defining aV-shaped recess, a series of roller cutters arranged along the edges ofthe recess, said frames having extensions, shafts mounted on theextensions, conical cutters arranged on the inner ends of the shafts,and roller cutters arranged on the outer ends of the shafts,

5. In a drill, a cutter including apair of diverging frames definingaV-shaped recess,

a series of roller cutters arranged along the edges of the recess, saidframeshaving ex-- tensions, shafts mounted onthe extensions, conicalcutters arranged on the inner ends of the shafts, roller cuttersarranged on the outer ends of the shafts, and reaming cutters rotatablymounted on the sides of said frames.

oscan M. eanrnn.

